I didn't think about the book at all when I was watching the movie. The movie quoted from the book a lot and it was GOOD. It was exceeded my expectations. The trailers fool you. They reshot almost all of the scenes from the trailers or changed the camera's view during the scene. It turned out to be so much better. I just hope they don't shoot sequels 'cause then they'll have to shoot Breaking Dawn, and I didn't think the book was necessary and some parts were 'ew.' But anyway, you GOT to watch the movie. You won't walk out disappointed.